Here is a worksheet that is difficult to find anywhere else, but covers an important aspect of counting ie counting in halves and quarters. The sheet looks at counting forwards and backwards and certainly the counting back in quarters requires concentration.
The final question asks for a number line from 0 to 4 to be drawn and then all the whole numbers, halves, quarters and intermediate eighths to be included. Completing this successfully will show a good understanding of quarters and eighths ie that 1/2 is the same as 4/8 etc.
This can be found in our year 3, Counting and Number category